Apparently, spirits have been frequenting the Chapel of the Chimes Memorial Park in Hayward, a suburb of San Francisco.
Deepak Sandhar covered approximately 150 headstones with soybean oil because they “were evil”. Including the oil and according to the Oakland Tribune “Singh also left small plastic figures, pieces of string and ribbons at several grave sites and was seen by grounds keepers moving flowers between headstones.”
Singh was arrested and placed in the Santa Rita Jail in Dublin California.
To learn more about spirits, how to get rid of them and have authority over them see prophet.tv or this teaching on Building the Warrior.
See: To Ward Off Evil Spirits, Man Slathers Vegetable Oil On Headstones: SFist.